The Jun-Meijin in the Edo era were those players who achieved 8-Dan (Jun-Meijin means Half-Meijin).
Yasui Santetsu 1612-1644 Hayashi Monnyusai 1612-???? Honinbo Sanetsu 1630-1658 Yasui Senkaku 1700-1737 Hayashi Bokunyu Monnyu 1706-1726 Inoue Sakuun Inseki 1721 Hayashi Incho Monnyu 1727-1743 Yasui Shuntetsu Senkaku 1737-1775 Yasui Senchi Senkaku 1780-1814 Honinbo Retsugen 1788-1808 Honinbo Genjo 1808-1827 Yasui Chitoku Senchi 1808-1838 Hayashi Genbi Monnyu 1819-1848 Inoue Genan Inseki 1828-1846 Honinbo Shuwa 1847-1873 Ito Showa 1801-1878
It should be noted that 17th-18th century dates are approximate as to when 8 Dan was achieved. As I get info I will correct it.